Fig. 1. Changes in conductivity and crystal structure of VO₂ at different temperatures

Fig. 2. Switchable broadband absorber structure diagram. (a) Top view; (b) side view

Fig. 3. Changes of absorption efficiencies under different conductivities

Fig. 4. The real part of the permittivity at different conductivities

Fig. 5. The imaginary part of the permittivity at different conductivities

Fig. 6. The real part and imaginary part of relative impedance and absorption efficiency curve of absorber under high temperature conditions

Fig. 7. The real part of the surface relative impedance at different conductivities

Fig. 8. The imaginary part of the surface relative impedance at different conductivities

Fig. 9. The transmission, absorption, and reflection curves of the adjustable broadband absorber under the vertical incidence of electromagnetic waves in the metal state

Fig. 10. Absorption curves at different polarization angles

Fig. 11. Absorption curves at different incident angles in TE mode

Fig. 12. Absorption curves at different incident angles in TM mode